Doub-le envelop



'(NO Model.)

S.. DOUBLE BNVELOP.

Patented May 31,1898.

A1 Tram/Ey;

UNTTED SdtarlsA ATENT OFFICE.

lVAL'lER SCO'IT'CARVER, OF BLOOMFIELD,NET J ERSY.

DOUBLE ENvELoP.

u SPECI-FTCATION forming part of Letters Patent No. 604.723, dated May31. 1898.

'Application iiled August 4, 1897. Serial No. 647,074. (No model.)

To altwhowt. it may concern.: Be it known thatl, WALTER SCOTT CARvER, acitizen of the United States, anda resident of Bloomfield, in the county,of Essex and State of New Jersey, have invented certain new and usefulImprovements in Double Envelops, of which the following is aspecification.

This invention relates to a certain new and useful improvement in twin yor double' envelops, and has for its object theeconomical production oftwo envelops .from a single sheet of material in -which no seams willappear on the front faces and which .may be used either together or bereadily detached and' used separately or be bound with similar envelopsbetween suitable covers to constitute a file.

To .these ends thereforem'),7 said .iislventienV consists'in apeculiarly-shaped 4blank properly folded and in the details ofconstruetion, all as hereinafter more particularly def scribed, andpointed out `in the claims.

designated, Figure lis a plan view of a blank. Fig. 2y is a similar viewshowing the blank folded over once' transversely and with the end flapsor seams in position. Fig. 3 is a back viewof theenvelop completed. Fig.4

is a vertical sectional view taken on the line no Fig. 3. Fig. 5 is aperspective View of `myinvcention when bound to constitutea file.

, Figs. v6 and 7 show blank and completed envelopsiembodying myinvention, but of different shape when completed from those shown inFigs. l and 3. 4 v l: f

The blaukl prefer touse is shown in Figs. l and 6, and consists of asingle sheet o'f'any appropriate material shaped to form the centralsubstantially rectangular portion ab,

4divided by -a transverse fold or crease ,c c

into two symmetriealand oppositely-disposed halves, each of which ispro'vided with diagonallyI opposite fiaps d and d', the similarly`arranged gummed'end iiaps e and e', and, if desired`,witl1 thediagonally opposite notches or ,cutsfandf When it is desired to providejfor the separate use ofthe envelops, a row of perforations f/ gisformed along the central longitudinal line of the blank, saidperforations being supplanted by a simple the face of b.

fold or crease when the envelops are designed to be used together. Theblank is gummed 'on both 'sides of the line g g.

' In forming the twin'ordouble envelop from the blank, a fold is made onthe line c c, and part o. of the blank is folded by revolving it on theline c c from left to right down upon The end. flap e iis then revolvedfrom right to left and gurnmed over the part "a, and the gummed end iiape is folded overion the part .b ,from left to right,

presenting the appearance shown in Fig, 2

and leaving the front faces of the envelops plain 'and free from seams.The two envelops'tlius lformed are then folded together on the crease orline of perforations g g, presenting the appearance shown in Fig. 3, andproducing two envelops joined together at heir-*bottom line, the objectof gumrning along said line being to separate the pockets of the twoenvelops, and whereY perforations are used vto permit the envelops to bedetached from each other and each remain per- In the accompanyingdrawings, in the sevf eral figures of which like parts are similarlyfeet and'intact.

l have illustra-ted in Fig. 4 a modification double envelops may bevbound together at .their meeting edges, as by sewing or pasting,

'on tape, muslin, parchment, dto., or hinged be tween suitable covers t,as in Fig. 5.

In Figs. 6 and 7 the arrangement and ina- I nipulation of the blank arethe same as abovedescribed, but the dignensions and shape of theresultant envelops are different, being of greater depth than width,whereas the envelops shown in Fig.V 2 are of greater lwidth than depth.When desired, my blank may be used as a single large envelop, as in Fig.2, by omitting the crease or perforationsv g g and gum along theirlineand folding over one of the 'flaps d or d to close the bottom, oneof the said iiaps being in this case gummed in place. While I have showneach of the envelops provid ed with covering-flaps d and ol',it will beobvious that one or both iiaps may be omitted, that one flap may be made4larger than the other, that the flap of the outer en-l IOO velop may bemade large enough to cover both, and that one or both of said flaps mayor may not be gummed. In Athe several views the gummedportions areindicated by crosshatching. y

What `I claim as my invention, and desire to secure by Letters Patent,is-

1. A double envelop composed of a blank formed'of a single piece ofmaterial and coinprising a substantially rectangular portion a, b,provided with diagonally opposite end flaps e and e', and folded uponitself, substantially as described.

2. A double envelop composed of a blank formed of a single piece ofmaterial and comprising a substantially rectangular portion a, b havinga central longitudinal row of perforations, and the diagonally oppositeend flaps e and e and properly folded upon itself, substantially asdescribed.

3. A double envelop composed of a blank formed of a single piece ofmaterial and coinprising a substantially vrectangular portion a,

- b, provided with the diagonally opposite end ilaps e'and e', andproperly folded upon itself, in combination with spreading strips orsubstantially as described.

5. A plurality of double envelops,each com posed of a blank formed of asingle piece -of material and comprising a substantially rectangularportion a, b, having the diagonally opposite end flaps e, e', and eachblank properly folded upon itself, to constitute two united envelops;said envelops being bound at their meeting edges between suitableeovv1ers, substantially as described.

i Signed at New York,in the county of New York and State of New York,this 30th day of July, A. D. 1897.

WALTER SCOTT CARVER.

Witnesses:

ADoLPH SCHROEDER, GEORGE 0.* WILLIAMS.

